This is an App for Hangil Monitoring IoT System. Data from sensors are stored in a server on AWS.
App gets JSON data from https connectin to this srever. (As of 21st December, fetching JSON from file not from server)
App has a stack navigator which contains four screens Welcome, Login, Signup, and Monitor. Monitor screen is an actual main screen of App. Welcome screen can be replaced by a splash file in iOS/Android App.